Understanding concepts

I’m so fascinated at how well Nathan has been expressing his understanding of concepts. He says:

I want water. Are you thirsty? (Translation: I am thirsty)

I want a snack. Are you hungry?

Look o. All the kids like it (scripting probably from school. Then, few minutes later:)
Can you see, all the children like it.

Unlike nouns, I was never sure if Nathan understood concepts like: hungry, thirsty, look and see. Apparently, he does.

Amazing how all in one day, so many concepts, well understood, are mentioned by Nathan!